Hi Scotty, I watched your video on Steel Seal Block sealant. I have read that this type of block sealant doesn't work well with Aluminum Blocks / Heads because it uses a silica / ceramic material that hardens and cant expand and contract with the heat cycles of the engine. Have you heard this or have any experience with this?

I’m considering using it on my 2002 Volvo XC70 2.4L Turbo. Here is whats going on:

On 2 occasions now the car lost all its coolant. One time the top radiator hose came off while on the highway in Arizona. I put the hose back on and really tightened the clamp. The Second time this happened (about 3 months later). instead of the hose popping off .... The plastic side of the radiator cracked. Indicating a tremendous amount of pressure. I had to replace the radiator.

I suspect the high pressure is somehow coming from the Turbo (is that possible?) or from a small head gasket leak allowing engine compression through the head gasket.

Why do I suspect head gasket? The Car does consume a small amounts of coolant (less than a quart a month) but not enough to produce white smoke or to show evidence of cross contamination in the motor oil or coolant reservoir.

I’d really appreciate any thoughts you (or the community) may have on the matter.

Thank you, and keep up the good work on your videos …I really enjoy them!

Comments (2)
No. 1-2
Scotty Kilmer
Scotty Kilmer

Editor

only use it on old green coolant systems. Use bars head gasket sealer that auto zone sells for new cars

Techsus
Techsus

Robert Spinner "Robert DIY" is the go-to for older Volvos: